Hi Carrie,
Good luck with your new home.
I would air tires to 100 lbs to start.
With coach fully loaded weigh front axle then rear axle,then lf wheel then rr wheels.
front axle weight less lf equals rf wheel weight.
rear axle weight less rr equals lr wheel weight.
Your tire brand company will have a chart suggesting a pressure.
I personally weigh mine about once a year and I keep my tires at 100 lbs minimum year around .
Have you checked the date code on your tires and had them inspected for cracking ?
There is a lot of info about this if you do a search on this site.
The tire police will be here shortly to give you all kinds of advice.
Again good luck and enjoy your new coach. The above info is just the way I do mine right or wrong.
Dave